fruit kelayu or fruit kalalayu

My friends, have you ever eaten this fruit, I also really like this fruit when I was little, this fruit is called fruit kelayu, the taste of the fruit is sweet when it is ripe, and if not yet cooked, the fruit tasted bitter. and the color of the flowers is white, when the ripe fruit will look very beautiful and dense, the birds also love this fruit. if we eat this fruit, our teeth will look black because the skin of the fruit ....